Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae4f7c76b6b8f4b…

MALICIOUS

PDF

47.3 KB Created: 2020-11-04 22:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e507c62b77236db99e1ea1ba952f03cf SHA-1: 13f0d4d4833a655ea73771cfc76f374703cf0e70 SHA-256: bae4f7c76b6b8f4b0fd3c50cd4bce825448fe2555c7422a7571b554c28bc2f4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or link farms, indicating a malicious intent to drive traffic to potentially harmful sites. The primary malicious URL identified is https://ttraff.me/123?keyword=marines+in+the+us+civil+war, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the same malicious URL and other PDF links, suggesting a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/123?keyword=marines+in+the+us+civil+war In PDF document text
    • https://koxarakofawel.weebly.com/uploads/1/3/4/3/134310925/6281477.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/2ed6eb7ca106a.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/gubapogufemiwuxerozo.pdfIn PDF document text
    • https://wovikuzejujitij.weebly.com/uploads/1/3/4/5/134506660/8471924.pdfIn PDF document text
    • https://voligamaxe.weebly.com/uploads/1/3/4/5/134512074/fekobekonod.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/silipenafiwipo.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/3e041503420.pdfIn PDF document text
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/xukiwaduvikadaxupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mipizaju/nezovabokixoxokuladoz.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/grade_6_math_workbook_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/pobegemewakigirozoneka.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/phalanx_concealment_facebook.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA2 4816 bytes
SHA-256: 9f87ab7ddceace38afa52ce806333ddd9683b109dbf1d7ea94255652771ed941
font_01_sfnt_off00007f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F00 10440 bytes
SHA-256: 677b036755429096be6cfb3ed713bb0a27541291952e57d5eac3a733e2fd5361
font_02_sfnt_off0000a274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA274 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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